Measure slab thickness.

An acoustic non-destructive test method.

Impact Echo

Introduction

PCTS use Olson Instruments NDE360. A CTS technician strikes the surface of a structural element with a tuned hammer (a steel ball of specific size) to produce a pressure wave (P-wave) pulse in the material of up to 90kHz that propagates into the structure and is reflected by internal discontinuities or external surfaces.